We add  Open Data BCN catalog two new filters to the existing ones of Theme / Sub-theme, Tags, Formats, Licenses, Geolocation and  Update Frequency. They are the Historical information filter, to facilitate the selection of datasets containing historical series and the CKAN API  available filter,  useful  for the most technical reuser  because  they can directly select the datasets with this interface. These both criteria are included in the dataset "Barcelona City Council Open Data catalogue - Open Data BCN"